Aerated switch cabinet

Abstract

The invention discloses an aerated switch cabinet, at least comprising an aerated cabinet, a high-voltage component, a permanent-magnetic vacuum switch and a isolating-grounding three-position switch, wherein the permanent-magnetic vacuum switch and the isolating-grounding three-position switch are connected integrally and arranged in the aerated cabinet in a closed mode. In the aerated switch cabinet, the permanent-magnetic vacuum switch and the integral design are used, thus realizing the good safety, the high reliability, the strong adaptability and the maintenance-free effect. The aerated switch cabinet is applied to 10-35kV power distribution networks with ungrounded neutral points, neutral points grounded by arc suppression coils and neutral points grounded by resistance.

Description

technical field [0001] The invention relates to an electrical device, in particular to an inflatable switchgear in a power distribution network. Background technique [0002] The switchgear is a large number of equipment used in the distribution network, and the safety of the switchgear is directly related to the safety and power supply reliability of the distribution network. Conventional switchgear adopts spring operating mechanism. Generally, all primary components such as circuit breakers, disconnectors, busbars, etc. are insulated by air, and only some switchgears are fully enclosed in gas-filled cabinets. Therefore, the conventional switchgear mainly has the following problems: [0003] (1) The conventional switchgear adopts a spring operating mechanism, with many mechanical components and complex structure, and mechanical locks are required when opening and closing. These mechanical parts are subjected to mechanical impact during each opening and closing operation, w...

AI Technical Summary

Problems solved by technology

[0003] (1) The conventional switchgear adopts a spring operating mechanism, with many mechanical components and complex structure, and mechanical locks are required when opening and closing. These mechanical parts are subjected to mechanical impact during each opening and closing operation, which is a traditional The main reason for the mechanical failure of the circuit breaker is poor reliability, and the mechanical characteristics of the spring operating mechanism are not well matched with the breaking characteristics of the vacuum switch; in addition, because the spring operating mechanism does not support the intelligence of the switch cabinet, it does not meet the requirements of the smart grid. requirements

[0004] (2) All primary components in conventional switchgear such as circuit breakers, isolating switches, busbars, etc. are air-insulated, so the requirements for the operating environment are relatively high, and generally cannot be used under harsh conditions

[0005] In addition, the space in the switch cabinet is extremely limited, and a certain insulation distance must be met under high-voltage conditions to ensure the safe use of various components

Due to the large size of the conventional permanent magnet vacuum switch, it cannot be applied in the switchgear, especially it cannot meet the requirements of the current smart grid for the primary equipment and the development direction of the primary equipment.

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